请教一道frm题目

CFAisme

In a securitized transaction,over-collateralization results whenA. The originator puts aside some cash in a reserve account to absorbcredit losses.B. A securitization transaction carves up the cash flows generated fromthe asset pool into various pieces.C. The interest payments and other fees received on the assets in the poolexceed the interest payment made on the ABS plus the fee paid to service theassets along with miscellaneous expenses.D. The value of the assets in the pool exceeds the amount of Asset BackedSecurity (ABS) involved.

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Correct answer is DA stands for cash reserve accountB definition for subordinated tranchingC mentions about excess spread D is correct defines over collateralization